Warning

Micro Organisms

Wide range of possible pathogens

Duration

Depends on source and patient response.

Notes

Important: Therapy

  • Prompt diagnosis is vital to allow early rationalisation of treatment.
  • Take blood (2 sets - 20mL per set) and urine cultures before starting treatment, plus swabs from any other focus of infection, e.g. sputum, wound etc
  • Treat if neutrophil count <0.5 x 109/L or <1.0 and falling.
  • Do not wait for FBC to confirm neutropenia - start treatment if suspected.
  • Follow local protocols.
  • All haematology patients (all lymphomas, leukaemias and myelomas) should be treated as high risk
  • Patients should be assessed within 15 minutes and antibiotics given as soon as possible, within 1 hour of diagnosis of sepsis.

Notes:

Neutropenic sepsis - Standard risk patients

Important: Therapy

 IV Piperacillin / tazobactam 4.5g 6 hourly

Notes:

Neutropenic sepsis - High risk patients

Important: Therapy

IV Piperacillin / tazobactam 4.5g 6 hourly

plus

Gentamicin# IV (Hartford Regimen) as per guideline

Use calculator

Notes:

Review the need for ongoing gentamicin on a daily basis according to severity.

#Consider aztreonam IV as an alternative to gentamicin for patients with CrCl ≤20ml/min

Aztreonam must be used with caution in patients with immediate hypersensitivity to penicillins or cephalosporins.

Aztreonam dosing:

CrCl 10 – 20ml/min - 2g loading dose then 1g 4 times daily

CrCl <10ml/min       - 2g loading dose then 500mg 4 times daily

  • Aztreonam does not provide the same antimicrobial spectrum cover as gentamicin.
  • Aztreonam does not provide gram-positive cover.

Neutropenic sepsis - Standard risk patients - if penicillin allergy

Important: Therapy

In Mild penicillin allergy

IV Ceftazidime 2g 8 hourly

 

In severe penicillin allergy

IV Meropenem 1g 8 hourly

(only if benefits of treatment outweigh the risk of severe allergy)

 

Notes:

Neutropenic sepsis - High risk patients - if penicillin allergy

Important: Therapy

In mild penicillin allergy:

IV Ceftazidime 2g IV 8 hourly

plus

Gentamicin# IV (Hartford Regimen) as per guideline

Use calculator

 

In severe penicillin allergy

Meropenem 1g 8 hourly

(only if benefits of treatment outweigh the risk of severe allergy)

 

 

Notes:

In mild penicillin allergy, review the need for ongoing gentamicin on a daily basis according to severity. 

#Consider aztreonam IV as an alternative to gentamicin for patients with CrCl ≤20ml/min

Aztreonam must be used with caution in patients with immediate hypersensitivity to penicillins or cephalosporins.

Aztreonam dosing:

CrCl 10 – 20ml/min - 2g loading dose then 1g 4 times daily

CrCl <10ml/min       - 2g loading dose then 500mg 4 times daily

  • Aztreonam does not provide the same antimicrobial spectrum cover as gentamicin.
  • Aztreonam does not provide gram-positive cover (if staphylococcal infection suspected, seek advice from microbiology).

Septic Shock

Important: Therapy

IV Meropenem 1g 8 hourly

Notes:

Editorial Information

Last reviewed: 28/05/2026

Next review date: 28/05/2027

Author(s): Specialist Antimicrobial Pharmacists.

Version: 0.1

Author email(s): gram.antibioticpharmacists@nhs.scot.

Approved By: Antimicrobial Management Team

Document Id: AMT_Emp_Hosp_Neutropenic Sepsis_0.1